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Cleanup: ust-tracepoint-event.h: extract `__num_fields` in a variable
[lttng-ust.git]
/
liblttng-ust
/
lttng-context-vpid.c
diff --git
a/liblttng-ust/lttng-context-vpid.c
b/liblttng-ust/lttng-context-vpid.c
index 5e5ed145d944adf08be61755eaa32faefe3e52b4..aa2586ef6009c9deda9d30ca12aa8987ad132c31 100644
(file)
--- a/
liblttng-ust/lttng-context-vpid.c
+++ b/
liblttng-ust/lttng-context-vpid.c
@@
-21,23
+21,13
@@
*/
#define _LGPL_SOURCE
*/
#define _LGPL_SOURCE
+#include <stddef.h>
#include <sys/types.h>
#include <unistd.h>
#include <lttng/ust-events.h>
#include <lttng/ust-tracer.h>
#include <lttng/ringbuffer-config.h>
#include <sys/types.h>
#include <unistd.h>
#include <lttng/ust-events.h>
#include <lttng/ust-tracer.h>
#include <lttng/ringbuffer-config.h>
-#ifdef __linux__
-static inline
-pid_t wrapper_getpid(void)
-{
- return getpid();
-}
-
-void lttng_context_vpid_reset(void)
-{
-}
-#else
/*
* We cache the result to ensure we don't trigger a system call for
* each event.
/*
* We cache the result to ensure we don't trigger a system call for
* each event.
@@
-45,11
+35,16
@@
void lttng_context_vpid_reset(void)
static pid_t cached_vpid;
static inline
static pid_t cached_vpid;
static inline
-pid_t wrapper_getpid(void)
+pid_t wrapper_get
v
pid(void)
{
{
- if (caa_unlikely(!cached_vpid))
- cached_vpid = getpid();
- return cached_vpid;
+ pid_t vpid;
+
+ vpid = CMM_LOAD_SHARED(cached_vpid);
+ if (caa_unlikely(!vpid)) {
+ vpid = getpid();
+ CMM_STORE_SHARED(cached_vpid, vpid);
+ }
+ return vpid;
}
/*
}
/*
@@
-58,9
+53,8
@@
pid_t wrapper_getpid(void)
*/
void lttng_context_vpid_reset(void)
{
*/
void lttng_context_vpid_reset(void)
{
-
cached_vpid = 0
;
+
CMM_STORE_SHARED(cached_vpid, 0)
;
}
}
-#endif
static
size_t vpid_get_size(struct lttng_ctx_field *field, size_t offset)
static
size_t vpid_get_size(struct lttng_ctx_field *field, size_t offset)
@@
-77,21
+71,17
@@
void vpid_record(struct lttng_ctx_field *field,
struct lttng_ust_lib_ring_buffer_ctx *ctx,
struct lttng_channel *chan)
{
struct lttng_ust_lib_ring_buffer_ctx *ctx,
struct lttng_channel *chan)
{
- pid_t
pid
;
+ pid_t
vpid = wrapper_getvpid()
;
- pid = wrapper_getpid();
- lib_ring_buffer_align_ctx(ctx, lttng_alignof(pid));
- chan->ops->event_write(ctx, &pid, sizeof(pid));
+ lib_ring_buffer_align_ctx(ctx, lttng_alignof(vpid));
+ chan->ops->event_write(ctx, &vpid, sizeof(vpid));
}
static
void vpid_get_value(struct lttng_ctx_field *field,
struct lttng_ctx_value *value)
{
}
static
void vpid_get_value(struct lttng_ctx_field *field,
struct lttng_ctx_value *value)
{
- pid_t pid;
-
- pid = wrapper_getpid();
- value->u.s64 = pid;
+ value->u.s64 = wrapper_getvpid();
}
int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx)
}
int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx)
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